I have a few new PCB projects in the mail today. Flatline Compressor by John Hollis Titan Boost by John Hollis Tremolo-matic XXVIII from Stompboxology Distort-o-matic XI from Stompboxology Bobtavia by Bob Starr John Hollis John Hollis was one of…
This project was originally from the Stompboxology newsletter. In a discussion about the circuit, the question came up about an extra op-amp used to create a second bias voltage buffer. This appears twice on the schematic as IC1B and IC2. IC2…
I got 6 new boards made at PCBWay.com. The PCBWay.com service is a great deal the biggest cost is shipping. The best deal is to order multiple boards at once since the shipping is combined. This time I waited til…
I made a couple small updates to the first Vulcan PCB. Got the new boards and did a build to confirm they are working as expected. Everything works as it should! This is a pretty good sounding overdrive distortion. The…
I had a few new PCB projects manufactured. Here are three projects I had been working on. These were drafted up in Eagle. I had these made at PCBWay.com.the cost was about $45 for 30 boards. I order 10 of…
First build of 2022! This is a 4069 version of RunOffGroove’s 22 The original uses the 4049 hex inverter. This the same circuit using the 4069. Both chips contain 6 inverters but the they differ in format and layout. The…
This is a version of the UBE Screamer using the 4069 in place of the 4049. Essentially these chips are the same. They both contain 6 inverters. The 4049 is a 16 pin DIP while the 4069 is a 14…
Here is a version of RunOffGrooves 22/7 using the 4069. The original circuit uses the 4049 Hex inverter. The 4049 is a 16 pin dip with 6 inverters. Here is the 4049UBE data sheet. You can see it has 16…
I just built a PCB project without the LED taken care of on the board, what a headache! In the old days everything was like that but we have evolved since then! in my most recent projects I have been…
I updated my 22/7 PCB. I had these boards made at PCBWay.com. These boards are great quality. Very cost effective. I’m a fan of OSH Park.com. They are good when you want only three boards, are in the US and…
Here is another Big muff. I had these boards manufactured at PCBWay.com. The idea was to make a Big Muff PCB that could be used to easily build any version of the standard Big Muff. The board has an on…
Does the world need another? I wanted to do a Big Muff using those 9mm pots. These seem like they might be a good build option. I also wanted to setup this PCB to use the same part numbers that…